Alarm clock



FIG. 1 is a front elevational view of a alarm clock showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top plan view thereof with the cover in an open position; and,

FIG. 8 is a perspective view of FIG. 7. 

The ornamental design for a alarm clock, as shown and described. 